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Labthink Instruments Co., Ltd.
Group: Labthink
Catalog excerpts
How to Test the Moisture Permeability of Sanitary Towel? Abstract The moisture permeability of sanitary towel substrate material influences its comfort directly. This article introduces a WVTR test of two sanitary towel substrate films from two manufacturers using cup method, including test principle, testing instrument C360M Water Vapor Transmission Rate Test System and its features Key Words Moisture Permeability, Water Vapor Transmission Rate, Cup Method, Gravimetric Method, Water Vapor Transmission Rate Test System, Sanitary Towel, Substrate Material, Substrate Film 1. Significance Comfort and gas permeability of sanitary towel are two of the key research subjects for manufacturers, also selling points that may attract consumers. The main indicators of the sanitary towel’s comfort include the ability to absorb and block the liquid, quick-drying and breathability. Those properties vary by different materials of sanitary towels. Generally speaking, the structure of the sanitary towels has mainly three layers: the surface layer, the absorbent layer, and the bottom layer. The surface layer is made of non-woven fabrics or perforated films, and it can quickly lead the liquid to the absorption layer so as to keep the surface dry. The absorbent layer is made of fluff pulp or water-absorbing polymer material, which absorbs liquid and prevents the liquid from flowing back. The bottom layer is mainly made of breathable PE material to ensure its breathability while preventing leakage. In this article, the moisture permeability of the substrate materials is discussed. 2. Test Specimen The test specimens are the substrate materials of the sanitary towels from two manufacturers. 3. Test Standard Currently four WVTR test methods are widely used, i.e. cup method, infrared sensor method, electrolytic sensor method and humidity sensor method. Considering the high water vapor transmission rate of the test specimens, cup method was used in the test according to ASTM E96, Standard Test Methods for Water Vapor Transmission of Materials 4. Testing Instrument
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Test ting instrum ment used in this test is C360M Water Vapo Transmis i or ssion Rate Test Syst manufa tem actured by Labthink In L nstruments Co., Ltd. C 4.1 Test Princip ple Cup method is also known as gravim p n metric metho The wat vapor tr od. ter ransmission rate is ob btained by a analyzing th weight ch he hange of th test cup over time. he Add certain am d mount of dis stilled water or desicca into the test cup. Th seal the test r ant hen e cup with the sp pecimen. Control the h humidity of the test ch f hamber to fo a humidity form diffe ference betw ween the ins side and ou utside...
Open the catalog to page 2
velocity in the test chamber is monitored and regulated in real time. Patented test chamber and test dishes with advanced fluid dynamics and thermodynamic designs ensure the uniform flow rate over the specimen surface, stable temperature and humidity, and create a uniform and stable testing environment. As a result, the test duration is shortened and the test results are more accurate. Unique, optional, DataShieldTM system, meets the requirements for centralized management of user data. It supports a variety of formats of exported data. Reliable security algorithms are used to prevent data...
Open the catalog to page 3
the WVTRs of the two samples are 601.4813 g/(m2·24h)and 1384.0073 g/(m2·24h). 7. Conclusion Sanitary towel substrate material’s moisture permeability is the key factor that influences its comfort and quick-drying ability. It can be concluded from the test results that the two samples have quite different moisture permeability. The difference in moisture permeability will affect the breathability of the sanitary towel. The testing instrument tested 2 samples at a time, greatly improves the testing efficiency. The testing instrument is easy to operate and provides reliable and accurate test...
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Archived catalogs
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Leak Tester2 Pages
